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In chess, the threefold repetition rule states that a player may claim a draw if the same position occurs three times during the game. The rule is also known as repetition of position and, in the USCF rules, as triple occurrence of position . [ 1 ]
In chess, there are a number of ways that a game can end in a draw, in which neither player wins.Draws are codified by various rules of chess including stalemate (when the player to move is not in check but has no legal move), threefold repetition (when the same position occurs three times with the same player to move), and the fifty-move rule (when the last fifty successive moves made by both ...
The threefold repetition rule was added, although at some times up to six repetitions have been required, and the exact conditions have been specified more clearly (see Threefold repetition § History of the rule). The fifty-move rule was also added. At various times, the number of moves required was different, such as 24, 60, 70, or 75.
A draw by perpetual check used to be in the rules of chess. [15] [16] Howard Staunton gave it as one of six ways to draw a game in The Chess-Player's Handbook. [17] It has since been removed because perpetual check will eventually allow a draw claim by either threefold repetition or the fifty-move rule.
The rules of chess are published by FIDE (Fédération Internationale des Échecs; "International Chess Federation"), ... Threefold repetition: ...
The other ways that a game can end in a draw are by stalemate, by a dead position, by the threefold repetition rule, by the fifty-move rule, by the fivefold repetition rule and by the seventy-five-move rule. A position is said to be a draw (or a "drawn position" or "theoretical draw") if either player can, through correct play, eventually force ...
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Contrary to the popular belief, chess is not a finite game without at least one of the fifty move rule or threefold repetition rule. Strictly speaking, chess is an infinite game therefore backward induction does not provide the minmax theorem in this game. [6] Backward induction is a process of reasoning backward in time.